PixelArray
PixelArray.cpp@2:b45a70faaa83, 2014-08-13 (annotated)
- Committer:
- chris
- Date:
- Wed Aug 13 20:26:32 2014 +0000
- Revision:
- 2:b45a70faaa83
- Parent:
- 1:41b9f8ec0b6a
Added a call in the constructor to clear the memory before its used
Who changed what in which revision?
User | Revision | Line number | New contents of line |
---|---|---|---|
chris | 0:bdce2379bd67 | 1 | #include "PixelArray.h" |
chris | 0:bdce2379bd67 | 2 | |
chris | 0:bdce2379bd67 | 3 | PixelArray::PixelArray(int size) |
chris | 0:bdce2379bd67 | 4 | { |
chris | 1:41b9f8ec0b6a | 5 | pbufsize = size; |
chris | 1:41b9f8ec0b6a | 6 | pbuf = new int[pbufsize]; |
chris | 2:b45a70faaa83 | 7 | SetAll(0x0); // initialise memory to zeros |
chris | 1:41b9f8ec0b6a | 8 | |
chris | 0:bdce2379bd67 | 9 | } |
chris | 0:bdce2379bd67 | 10 | |
chris | 0:bdce2379bd67 | 11 | PixelArray::~PixelArray() |
chris | 0:bdce2379bd67 | 12 | { |
chris | 1:41b9f8ec0b6a | 13 | delete[] pbuf; |
chris | 0:bdce2379bd67 | 14 | } |
chris | 0:bdce2379bd67 | 15 | |
chris | 0:bdce2379bd67 | 16 | void PixelArray::SetAll(unsigned int value) |
chris | 0:bdce2379bd67 | 17 | { |
chris | 0:bdce2379bd67 | 18 | // for each pixel |
chris | 1:41b9f8ec0b6a | 19 | for (int i=0 ; i < pbufsize; i++) { |
chris | 0:bdce2379bd67 | 20 | __set_pixel(i,value); |
chris | 0:bdce2379bd67 | 21 | } |
chris | 0:bdce2379bd67 | 22 | } |
chris | 0:bdce2379bd67 | 23 | |
chris | 0:bdce2379bd67 | 24 | |
chris | 0:bdce2379bd67 | 25 | void PixelArray::SetAllI(unsigned char value) |
chris | 0:bdce2379bd67 | 26 | { |
chris | 0:bdce2379bd67 | 27 | // for each pixel |
chris | 1:41b9f8ec0b6a | 28 | for (int i=0 ; i < pbufsize; i++) { |
chris | 0:bdce2379bd67 | 29 | __set_pixel_component(i,3,value); |
chris | 0:bdce2379bd67 | 30 | } |
chris | 0:bdce2379bd67 | 31 | } |
chris | 0:bdce2379bd67 | 32 | |
chris | 0:bdce2379bd67 | 33 | |
chris | 0:bdce2379bd67 | 34 | |
chris | 0:bdce2379bd67 | 35 | void PixelArray::SetAllR(unsigned char value) |
chris | 0:bdce2379bd67 | 36 | { |
chris | 0:bdce2379bd67 | 37 | // for each pixel |
chris | 1:41b9f8ec0b6a | 38 | for (int i=0 ; i < pbufsize; i++) { |
chris | 0:bdce2379bd67 | 39 | __set_pixel_component(i,2,value); |
chris | 0:bdce2379bd67 | 40 | } |
chris | 0:bdce2379bd67 | 41 | } |
chris | 0:bdce2379bd67 | 42 | |
chris | 0:bdce2379bd67 | 43 | void PixelArray::SetAllG(unsigned char value) |
chris | 0:bdce2379bd67 | 44 | { |
chris | 0:bdce2379bd67 | 45 | // for each pixel |
chris | 1:41b9f8ec0b6a | 46 | for (int i=0 ; i < pbufsize; i++) { |
chris | 0:bdce2379bd67 | 47 | __set_pixel_component(i,1,value); |
chris | 0:bdce2379bd67 | 48 | } |
chris | 0:bdce2379bd67 | 49 | } |
chris | 0:bdce2379bd67 | 50 | |
chris | 0:bdce2379bd67 | 51 | void PixelArray::SetAllB(unsigned char value) |
chris | 0:bdce2379bd67 | 52 | { |
chris | 0:bdce2379bd67 | 53 | // for each pixel |
chris | 1:41b9f8ec0b6a | 54 | for (int i=0 ; i < pbufsize; i++) { |
chris | 0:bdce2379bd67 | 55 | __set_pixel_component(i,0,value); |
chris | 0:bdce2379bd67 | 56 | } |
chris | 0:bdce2379bd67 | 57 | } |
chris | 0:bdce2379bd67 | 58 | |
chris | 0:bdce2379bd67 | 59 | |
chris | 0:bdce2379bd67 | 60 | |
chris | 0:bdce2379bd67 | 61 | |
chris | 0:bdce2379bd67 | 62 | |
chris | 0:bdce2379bd67 | 63 | void PixelArray::Set(int i, unsigned int value) |
chris | 0:bdce2379bd67 | 64 | { |
chris | 1:41b9f8ec0b6a | 65 | if ((i >= 0) && (i < pbufsize)) { |
chris | 0:bdce2379bd67 | 66 | __set_pixel(i,value); |
chris | 0:bdce2379bd67 | 67 | } |
chris | 0:bdce2379bd67 | 68 | } |
chris | 0:bdce2379bd67 | 69 | |
chris | 0:bdce2379bd67 | 70 | |
chris | 0:bdce2379bd67 | 71 | |
chris | 0:bdce2379bd67 | 72 | void PixelArray::SetI(int i, unsigned char value) |
chris | 0:bdce2379bd67 | 73 | { |
chris | 1:41b9f8ec0b6a | 74 | if ((i >= 0) && (i < pbufsize)) { |
chris | 0:bdce2379bd67 | 75 | __set_pixel_component(i,3,value); |
chris | 0:bdce2379bd67 | 76 | } |
chris | 0:bdce2379bd67 | 77 | } |
chris | 0:bdce2379bd67 | 78 | |
chris | 0:bdce2379bd67 | 79 | |
chris | 0:bdce2379bd67 | 80 | void PixelArray::SetR(int i, unsigned char value) |
chris | 0:bdce2379bd67 | 81 | { |
chris | 1:41b9f8ec0b6a | 82 | if ((i >= 0) && (i < pbufsize)) { |
chris | 0:bdce2379bd67 | 83 | __set_pixel_component(i,2,value); |
chris | 0:bdce2379bd67 | 84 | } |
chris | 0:bdce2379bd67 | 85 | } |
chris | 0:bdce2379bd67 | 86 | |
chris | 0:bdce2379bd67 | 87 | void PixelArray::SetG(int i, unsigned char value) |
chris | 0:bdce2379bd67 | 88 | { |
chris | 1:41b9f8ec0b6a | 89 | if ((i >= 0) && (i < pbufsize)) { |
chris | 0:bdce2379bd67 | 90 | __set_pixel_component(i,1,value); |
chris | 0:bdce2379bd67 | 91 | } |
chris | 0:bdce2379bd67 | 92 | } |
chris | 0:bdce2379bd67 | 93 | |
chris | 0:bdce2379bd67 | 94 | void PixelArray::SetB(int i, unsigned char value) |
chris | 0:bdce2379bd67 | 95 | { |
chris | 1:41b9f8ec0b6a | 96 | if ((i >= 0) && (i < pbufsize)) { |
chris | 0:bdce2379bd67 | 97 | __set_pixel_component(i,0,value); |
chris | 0:bdce2379bd67 | 98 | } |
chris | 0:bdce2379bd67 | 99 | } |
chris | 0:bdce2379bd67 | 100 | |
chris | 0:bdce2379bd67 | 101 | |
chris | 0:bdce2379bd67 | 102 | int* PixelArray::getBuf() |
chris | 0:bdce2379bd67 | 103 | { |
chris | 1:41b9f8ec0b6a | 104 | return (pbuf); |
chris | 0:bdce2379bd67 | 105 | } |
chris | 0:bdce2379bd67 | 106 | |
chris | 0:bdce2379bd67 | 107 | |
chris | 0:bdce2379bd67 | 108 | // set either the I,R,G,B value of specific pixel channel |
chris | 0:bdce2379bd67 | 109 | void PixelArray::__set_pixel_component(int index, int channel, int value) |
chris | 0:bdce2379bd67 | 110 | { |
chris | 0:bdce2379bd67 | 111 | |
chris | 0:bdce2379bd67 | 112 | // AND with 0x00 shifted to the right location to clear the bits |
chris | 1:41b9f8ec0b6a | 113 | pbuf[index] &= ~(0xFF << (8 * channel)); |
chris | 0:bdce2379bd67 | 114 | |
chris | 0:bdce2379bd67 | 115 | // Set the bits with an OR |
chris | 1:41b9f8ec0b6a | 116 | pbuf[index] |= (value << (8 * channel)); |
chris | 0:bdce2379bd67 | 117 | } |
chris | 0:bdce2379bd67 | 118 | |
chris | 0:bdce2379bd67 | 119 | |
chris | 0:bdce2379bd67 | 120 | // set either the I,R,G,B value of specific pixel channel |
chris | 0:bdce2379bd67 | 121 | void PixelArray::__set_pixel(int index, int value) |
chris | 0:bdce2379bd67 | 122 | { |
chris | 0:bdce2379bd67 | 123 | // AND with 0x00 shifted to the right location to clear the bits |
chris | 1:41b9f8ec0b6a | 124 | pbuf[index] = value; |
chris | 0:bdce2379bd67 | 125 | } |
chris | 0:bdce2379bd67 | 126 | |
chris | 0:bdce2379bd67 | 127 |